RFR: 8369440: Replace RootResolverMarkScope and RootSetClosureMarkScope with NMethodMarkingScope

[Albert Mingkun Yang]

On Thu, 9 Oct 2025 14:19:22 GMT, Francesco Andreuzzi <fandreuzzi at openjdk.org> wrote:

> `RootResolverMarkScope` and `RootSetClosureMarkScope` have equivalent implementations to `NMethodMarkingScope`. They can be replaced to be more clear about what is actually needed.
> 
> We can also delete `strongRootsScope.hpp`, this change removes its last usages.
> 
> Passes tier1 and tier2 (fastdebug).

Preexisting: why the two "*MarkScope" are needed at all? (I can't find the code that actually requires the use of `NMethodMarkingScope`.)

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PR Comment: https://git.openjdk.org/jdk/pull/27729#issuecomment-3386220428